Aguirre Spring Campground, just east of Las Cruces, New Mexico, tucked up against the Organ Mountains, with a view of the White Sands area and Alamogordo in the distance. It's a very dramatic location. And cheap. Seven dollars a night, but only half that with a senior pass (which I qualify for in a few days).
Alas, my traveling bone won't let me stay long. Too many other places to see and be. But I'll be back.